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2. Pipe recovery operations - Wikipedia

   en.wikipedia.org/wiki/Pipe_recovery_operations

   The Drill Collar Severing Tool is often used to separate heavy weight drill pipe or drill collars. The DCST contains an explosive charge at either end of the tool; both charges are detonated simultaneously. The explosive shock waves meet in the center of the tool and combine to produce a very high energy wave capable of cutting through the ...

3. Bottom hole assembly - Wikipedia

   en.wikipedia.org/wiki/Bottom_hole_assembly

   Rotary assemblies [2] are commonly used where formations are predictable and the rig economics are an issue. In such an assembly the weight of the drill collars gives the BHA the tendency to sag or flex to the low side of the hole, collar stiffness length and stabiliser diameter and placement are engineered as a means of controlling the flex of the BHA.

4. Horse harness - Wikipedia

   en.wikipedia.org/wiki/Horse_harness

   A horse harness is a device that connects a horse to a horse-drawn vehicle or another type of load to pull. There are two main designs of horse harness: (1) the breast collar or breaststrap, and (2) the full collar or collar-and-hames. For pulling heavy loads, a full collar is required because it distributes pressure over a larger area of the ...

5. Drill pipe - Wikipedia

   en.wikipedia.org/wiki/Drill_pipe

   The drill string consists of both drill pipe and the bottom hole assembly (BHA), which is the tubular portion closest to the bit. The BHA will be made of thicker walled heavy weight drill pipe (HWDP) and drill collars, which have a larger outside diameter and provide weight to the drill bit and stiffness to the drilling assembly.

6. Horse collar - Wikipedia

   en.wikipedia.org/wiki/Horse_collar

   However, the findings of Lefebvre des Noëttes were not without challenges, notably the argument that there was an early partial horse collar, a dorsal yoke system, dating to ancient Rome, and that Lefebvre's designs did not accurately reflect those actually used, but rather created an inaccurate design that was less efficient than any actual ...

7. Breastplate (tack) - Wikipedia

   en.wikipedia.org/wiki/Breastplate_(tack)

   The breast collar harness is one of two main harness designs. The other design is the collar and hames design, also called a "full collar", which is required in order to pull very heavy loads because it distributes pressure over a larger area of the horse. One of the main advantages of using a breast collar style harness is that it fits on ...

8. Vancouver Whitecaps part ways with head coach Vanni Sartini ...

   www.aol.com/sports/vancouver-whitecaps-part-ways...

   Two weeks after their postseason came to an end, the Vancouver Whitecaps are already making changes. The team announced Monday that it is parting ways with head coach Vanni Sartini, and will be ...

9. Measurement while drilling - Wikipedia

   en.wikipedia.org/wiki/Measurement_while_drilling

   MWD tools may be semi-permanently mounted in a drill collar (only removable at servicing facilities), or they may be self-contained and wireline retrievable. [citation needed] Retrievable tools, sometimes known as Slim Tools, can be retrieved and replaced using wireline through the drill string. This generally allows the tool to be replaced ...